Re: KASAN: slab-out-of-bounds Read in bitmap_ipmac_list

[syzbot]

syzbot has bisected this bug to:

commit ed246cee09b9865145a2e1e34f63ec0e31dd83a5
Author: John Hurley <john.hurley@xxxxxxxxxxxxx>
Date:   Sun Jul 7 14:01:55 2019 +0000

    net: core: move pop MPLS functionality from OvS to core helper

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=127260f1e00000
start commit:   ab7541c3 Merge tag 'fuse-fixes-5.5-rc7' of git://git.kerne..
git tree:       upstream
final crash:    https://syzkaller.appspot.com/x/report.txt?x=117260f1e00000
console output: https://syzkaller.appspot.com/x/log.txt?x=167260f1e00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=d9290aeb7e6cf1c4
dashboard link: https://syzkaller.appspot.com/bug?extid=190d63957b22ef673ea5
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=15fe12a5e00000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1138dfaee00000

Reported-by: syzbot+190d63957b22ef673ea5@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: ed246cee09b9 ("net: core: move pop MPLS functionality from OvS to core helper")

For information about bisection process see: https://goo.gl/tpsmEJ#bisection